Acarbose is mainly used to reduce postprandial blood glucose in diabetic patients, and can be used for treatment when postprandial blood glucose control is still not up to standard after diet and exercise control. Acarbose is an α-glucosidase inhibitor. The pharmacological effect of Acarbose is to inhibit the α-glucosidase of the small intestinal mucosa, delaying the absorption of sugar, thus lowering blood sugar. The intestinal absorption of the drug is very small, usually no systemic toxic reaction, but the liver, kidney insufficiency should still be used with caution. It is not suitable for people with gastrointestinal dysfunction, pregnant women, lactating women and children. Common adverse reactions to this drug are gastrointestinal reactions such as bloating, increased gas or diarrhea. Starting with a small dose and gradually increasing the dosage is an effective way to minimize adverse reactions. It is recommended that patients take acarbose under the guidance of a doctor, and if uncomfortable symptoms occur, go to the hospital in a timely manner to avoid the adverse consequences of blind use of drugs.